CI: Use proper VLC release tarball

As noted by ePirat, the VLC releases on GitHub are not official
releases, just repo snapshots. Use the official VLC 3.0.4 release
tarball to ensure maximum stability.

CI/before-script-osx.sh

@@ -9,7 +9,7 @@ cmake -DENABLE_SPARKLE_UPDATER=ON \
 -DCMAKE_OSX_DEPLOYMENT_TARGET=10.11 \
 -DQTDIR=/usr/local/Cellar/qt/5.10.1 \
 -DDepsPath=/tmp/obsdeps \
--DVLCPath=$PWD/../../vlc-3.0-3.0.4 \
+-DVLCPath=$PWD/../../vlc-3.0.4 \
 -DBUILD_BROWSER=ON \
 -DBROWSER_DEPLOY=ON \
 -DCEF_ROOT_DIR=$PWD/../../cef_binary_${CEF_BUILD_VERSION}_macosx64 ..

CI/install-dependencies-osx.sh

@@ -37,8 +37,8 @@ tar -xf ./osx-deps-2018-08-09.tar.gz -C /tmp
 
 # Fetch vlc codebase
 hr "Downloading VLC repo"
-wget --quiet --retry-connrefused --waitretry=1 -O vlc-3.0-3.0.4.zip https://github.com/videolan/vlc-3.0/archive/3.0.4.zip
-unzip -q ./vlc-3.0-3.0.4.zip
+wget --quiet --retry-connrefused --waitretry=1 https://downloads.videolan.org/vlc/3.0.4/vlc-3.0.4.tar.xz
+tar -xf vlc-3.0.4.tar.xz
 
 # Get sparkle
 hr "Downloading Sparkle framework"